From the Post-Dispatch story cited in the USA Today piece in your post:

Lelonek called an all-sixth-grade assembly first thing Tuesday morning. She said she asked the students if they had heard of each designated "day." Nearly all raised their hands. Then she asked, "What's tomorrow going to be? 'Hit A Principal Day?'"

"You could have heard a pin drop," she said. "One started saying, 'Oh, no, Ms. Lelonek.'"

"I said, 'Don't say a word.'"

Lelonek said discipline will range from parent conferences to suspensions.

She said the sixth-graders will be studying the Holocaust later this year. "It's going to be a little more meaningful this year than it's ever been before," she said.

It sure sounds like the principal gets it, and the students (and parents) are about to.

Ugh. Part of the reason I moved to St. Louis is to get away from such bigotry. Granted, most people are still a lot better than my small rural illinois town (one kid i know framed his great grandfather's slave trading papers and hung them on his wall). But still...such a sad state of mind to live in.